Deterministic and Uncertainty Analysis of a Reservoir Slope Stability and Failure Mechanism Under Combined Action of Multi-hazards

Su, Zhengyang; Wang, Yakun; Zhang, Hao

doi:10.1007/s10706-021-02020-6

Cited by 2 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhao and Li [4] used artifcial bee colony and relevance vector machine to establish a model to describe the relationship between displacement increments and geomechanical parameters so as to predict rock mass deformation and related uncertainties. Under the combined action of continuous rainfall and water level fuctuation, Su et al [5] studied the stability of reservoir slope using the deterministic method and uncertain method (the Monte Carlo simulation method). It is worth noting that although there are many studies focusing on the uncertainty of geological parameters, while the sensitivity analysis method costs much computation time.…”

Section: Introductionmentioning

confidence: 99%

Stability Evaluation of Slope Based on Global Sensitivity Analysis

Xu,

Wang,

Guo

et al. 2024

Complexity

View full text Add to dashboard Cite

The uncertainty of parameters will have a significant impact on slope stability, where sensitivity analysis is a commonly used method in uncertainty research. However, traditional sensitivity analysis method costs much computation time. When calculating the sensitivity index of one parameter, all other parameters are taken as fixed values, and the uncertainty of all parameters cannot be considered simultaneously. Therefore, the variance-based and the moment-independent global sensitivity analysis (GSA) methods are both introduced to determine the influence of geotechnical parameters on slope stability in this study. To solve the importance index of GSA, the least angle regression algorithm, the kernel density estimation, and orthogonal polynomial estimation methods are developed to obtain variance-based importance index and the moment-independent importance index, respectively. The proposed methods allow all variables to change simultaneously within their variation range and have high computational efficiency. The results are in good at with those obtained by the variance-based Monte Carlo simulation method, which is considered as the exact solution forobtaining the importance index. The influence of the correlation between the shear strength parameters (c and φ) on the importance index is also studied, which indicates that the negative correlation will have a great impact on the importance index, which in turn affects the safety assessment of slope. Three engineering cases have been studied for engineering application, and the compared results indicate that the impact of the geotechnical parameters uncertainty on the safety factor (Fs) and failure probability (pf) are different. Therefore, the approaches based on GSA which can integrate the Fs with pf will be a promising approach for slope stability evaluation.

show abstract

Section: Introductionmentioning

confidence: 99%

Stability Evaluation of Slope Based on Global Sensitivity Analysis

Xu,

Wang,

Guo

et al. 2024

Complexity

View full text Add to dashboard Cite

show abstract

The effect of lateral thrust on the progressive slope failure under excavation and rainfall conditions

Yu,

Zhao,

Gong

et al. 2024

Nat Hazards

View full text Add to dashboard Cite

Large landslides can involve the multiple failures of regional slopes. To understand the effect of lateral thrust caused by the failure of one slope on its surroundings, the failures of two adjacent highway slopes in Guangdong Province, China, were investigated in detail. The interactive failure processes and landslide morphological characteristics of the two slopes were first analyzed based on the on-site investigation. Then, a plane mechanical model of a large-scale slope was established to evaluate the significant influence of the lateral thrust generated by the west slope acting on the east excavated slope. Furthermore, the extrusion effect of the west slope was modelled under the alternate excavation disturbance and rainfall by transferring the thrust forces onto the interface elements, and the induced failure mechanism and instability mode of the east slope under lateral thrust were reproduced numerically. The results show that the compression-shear failure occurred at the middle and rear slope bodies because of the lateral thrust, which led to the formation of a thrust landslide and the final instability of the east slope.

show abstract

Deterministic and Uncertainty Analysis of a Reservoir Slope Stability and Failure Mechanism Under Combined Action of Multi-hazards

Cited by 2 publications

References 22 publications

Stability Evaluation of Slope Based on Global Sensitivity Analysis

Stability Evaluation of Slope Based on Global Sensitivity Analysis

The effect of lateral thrust on the progressive slope failure under excavation and rainfall conditions

Contact Info

Product

Resources

About